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  • $\begingroup$ I'm going to take a while to digest your code up there. Can you please (please) describe, verbosely, your code and how it works? $\endgroup$ Commented Oct 12, 2016 at 17:59
  • $\begingroup$ @SumNeuron, a major advantage of functional approach is that it's a pipeline, that you can segment anywhere you want. Try each step in turn to see the effect, eg try {d1 // GroupBy[Query@"Gene"], d2 // GroupBy[Query@"Gene"]} // Merge[ Merge[Mean]] // Dataset -- it's unfortunate that Dataset has to be wrapped and Normalized so many times $\endgroup$ Commented Oct 12, 2016 at 18:03
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    $\begingroup$ @SumNeuron, unfortunately, Stackexchange is not conducive to tutoring, but reach me at my email, I'll be happy to give you a tutorial. In fact I'd like to start a Khan Academy thing for data. $\endgroup$ Commented Oct 12, 2016 at 18:06
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    $\begingroup$ sent the email :) Also will do. Why do you think that is? this kind of dataset manipulation is common, so shouldn't there be a pretty succinct way of doing this? $\endgroup$ Commented Oct 12, 2016 at 18:16
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    $\begingroup$ Also this is throwing warnings all over :( I'm using v11 if that makes any difference. $\endgroup$ Commented Oct 12, 2016 at 18:22